Improvement in apparatus for removing and replacing the dandy-rolls of paper



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JAMES F. MARSHALL,

Improvement in Apparatus for removing and replacing the Dandy RoHs ofPaper Machines;

' NO.123,573. Patentefi Feb. 13, 1872.

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NO.123,573. w I Patented Feb. 13, 1872.

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JAMES F. MARSHALL, OF LOUISVILLE, KENTUCKY.

Y IMPROVEMENT IN APPARATUS FOR REMOVlNG AND REPLACING THE DANDY-ROLLS OFPAPER- MACHINES.

Specification forming part of Letters Patent No. 123,573, dated February13, 1872.

I, J urns F. MARsHALL, of the city of Louisville, in the county ofJefferson and State of Kentucky, have invented a certain new and usefulApparatus for Placing the Dandy and other Rolls of Paper-MakingMachines, of which the following is a specification:

My invention, in general, relates to an apparatus whereby the dandy-rollof a papermaking machine may be easily and quickly removed therefrom andreplaced therein, without stopping the machine or injuring thepaper'pulp-premising here that my apparatus,

with an omission of some of its features, is applicable to raising andlowering the cylinder-washer in arag-engine and other rolls in apaper-machine. My invention, in detail, re-

- lates, first, to a device whereby the dandy-roll may be quickly raisedor lowered vertically; secondly, to a tramway whereby the liftingdevice, with its appurtenances and the dandyroll, may be rolled away adesirable distance from the paper-machine or returned thereto;

thirdly, to a save-all to catch the drippings of the dandy-roll whilesuch roll is being removed from the paper-machine; fourthly, to anarrangement of gear whereby the dandy-roll, while being replaced in themachine, is made to revolve at the same speed as the paper-pulp passingthrough the machine, thereby saving the pulp from injury on coming intocontact with the dandy.

In the accompanying drawing forming part of this specification, (scaletwo-thirds of inch to the foot,) Figure 1 is a front elevation of myimproved apparatus as applied for placing the dandy. Fig. 2'is a sideelevation of the same. Fig. 3 is a front elevation of the same asapplied to remove or replace the washing cylinder in a rag-engine. Fig.4 is an end elevation of the slotted journalguides for thewashing-cylinder of Fig. 3.

General Description.

A is a tramway, supported in any suitable manner-as, for example, byhangers a; a: attached to the ceiling. D is the supporter or girder ofthe lifting device, suspended by links 0 from wheels B B, which latterroll upon the tramway. From each end of girder D vertical beams 4 4descend a suitable distance, the lower end of each beam being slotted.The

.all the drip from said roll.

fulcrum end of a lever, H, is pivoted within such slot. Levers H Hproject from point a a inwardly and approach near together. K is a yokeor bar connecting the neighboring ends of levers H H, which latter areinserted into and play within loops X X, attached, respectively, to eachend of the yoke. A vertical bar, Gr, attached to the middle of yoke K,slides vertically upon a bar, L, which latteris secured below, at 5, tothe frame of the lifting device, and slides vertically through a stapleor guide-way in girder D as the lifting apparatus is raised. The frameof the lifting device consists of a truss and cross-pieces, secured atthe ends by uprights M M. The upper end of one of the latter is pivotedto one lever, H, near its middle, at I), and the upper end of the otherupright to the other lever, H, in a similar manner. To the lower part ofthe uprights M M are attached rods N N, which have a vertical adjustmentby a screw and nut, 7, or other suitable device. The lower end of eachrod is made into a hook of proper size to receive either a shoulder orprolongation of the journal of the dandy-roll and permit its rotationtherein. F is the operatinglever pivoted on the swinging fulcrum at l inthe hanger E, and having one end pivoted at 2 to the sliding upright Gr.Fastened to the outer end of this lever is a cord, 1*, which, whenhooked over a stub, 0, retains the dandy at the proper elevation forremoving it. f is the save-all, which is a gutter of such size that whenswung under the dandy-roll it shall catch Each end of the save-all issupported by a rod, 8, one end of which is attached to the save-all andthe other pivoted to a rod, N. 9 is a catch for supporting the save-allwhen turned up. 0 e are slotted boxes, open at the top to receive thejournals R R of the dandy P. Upon one end of the dandy is a gear-wheel,S. T is a pinion,-

and 4) the tramway may be dispensed with,

and the slot in each journal-box is to be made deeper.

The mode in which my apparatus operates is as follows: To place thedandyroll on the paper-machine one of the journals R of the dandy-rollis in each hook of rods N N. The lifting apparatus is then rolled on thetramway A until it is over the machine. The line r is then loosened fromstub t, and the lever F gradually allowed to rise. The fulcrum end of Fat 2 falls, and upright G falls with it. Yoke K falls with G, andcarries down'with it the near ends of levers H H. As these latter arelowered they let down the uprights M M, and the entire truss andframework 6 6 6 6, and the rods N N, and the dandy-roll 1?. As thedandy-roll is lowered its journals enter the slotted guides e, the gearS engages the revolving pinion T, and the dandy-roll is there by made torevolve at the same rate of speed as the sheet of pulp below, so that asthe dandy-roll comes into contact with the moving pulp it does notinjure it. The. dandy-roll now being in place, the apparatus is raisedby drawing down the lever F and securing it by passing the string 1"over stub t. To remove the dandy the apparatus is rolled over themachine and lowered, its hooks are placed under the respective journalsof the dandy, and by a rapid downward movement of the lever F the dandyis suddenly lifted from its bed; at the same time the save-all f isloosened from catch 9 and allowed to drop under the dandy, as shown bythe dotted lines of Fig-2. The

suddenness with which the dandy is lifted prevents it from injuring themoving pulp with which it has been in contact, while the saveall comingunder the dandy, catches all the drip and prevents it from reaching andinj uring the pulp.

To raise and lower the cylinder in the washing-engine the apparatus isoperated in a manner similar to that described for placing the dandy.

The tramway A and wheels B B may be dispensed with and the girder D bestationary. The save-all may also be dispensed with.

It is a great dcsideratum for paper-makers to be able to remove andreplace the dandy while the machine continues in full operation withoutinjuring the papenpulp.

and replace the roll without injury to the pa-' per.

I claim, broadly, to be the first to apply the device or apparatus forlifting the dandy-roll from a paper-machine, and also to be the first toapply a device or apparatus for replacing the dandy-roll therein.

What I claim as new is- 1. The described or equivalent mechanism forremoving the dandy-roll from a paper-machine and for replacing saiddandy-roll there- 1n.

2. The combination of swinging fulcrum E, lever F, upright G, yoke K,levers H H, fulcrums a a, and the frame of the lifting device,substantially as and for the purposes set forth.

3. The combination of the swinging fulcrum E, the lever F, upright G,and the frame of the lifting device, substantially as and for thepurposes set forth.

4. The combination of the tramway and the lifting apparatus,substantially as afore described, substantially as and for the purposesmentioned.

5. A dandy-roll provided. with gear or friction-roller or itsequivalent, in combination with suitable power-gear for giving therequisite speed of revolution to the dandy-roll while being placed inthe paper-machine, substantially as and for the purposes specified.

6. A lifting device provided with hooks N N, substantially as and forthe purposes specified.

7. A lifting device provided with adjuster, ble hooks N N, substantiallyas and for the purposes set forth.

8. A save-all, f, in combination with the device for lifting the dandy,substantially as and for the purposes set forth.

JAMES F. MARSHALL.

YVitnesses:

W'. S. HAMILTON, J AS. L. RUBEL.

